small fix to avoid ZeroDivisionError
small fix to avoid ZeroDivisionError
ktnyt/chainer,keisuke-umezawa/chainer,jnishi/chainer,hvy/chainer,wkentaro/chainer,anaruse/chainer,niboshi/chainer,chainer/chainer,keisuke-umezawa/chainer,kikusu/chainer,okuta/chainer,ktnyt/chainer,jnishi/chainer,kikusu/chainer,chainer/chainer,ktnyt/chainer,cemoody/chainer,cupy/cupy,AlpacaDB/chainer,hvy/chainer,jnishi/chainer,cupy/cupy,niboshi/chainer,wkentaro/chainer,tkerola/chainer,hvy/chainer,wkentaro/chainer,AlpacaDB/chainer,keisuke-umezawa/chainer,cupy/cupy,jnishi/chainer,cupy/cupy,ktnyt/chainer,pfnet/chainer,aonotas/chainer,hvy/chainer,wkentaro/chainer,ysekky/chainer,rezoo/chainer,niboshi/chainer,kashif/chainer,niboshi/chainer,benob/chainer,keisuke-umezawa/chainer,okuta/chainer,kiyukuta/chainer,okuta/chainer,chainer/chainer,delta2323/chainer,ronekko/chainer,benob/chainer,okuta/chainer,chainer/chainer